One in 17 high school seniors said he or she had used marijuana every day.
In 2017, more than 1 in 4 high school seniors said they've vaped during the past year - and most apparently don't know they're toying with a potentially addictive product. It was the first time the annual survey asked about marijuana vaping and "it's much higher than I expected", said Richard Miech, the University of MI researcher who leads the study. For 8graders, usage was 7 percent this year and 8 percent last year. Flavoring, or filling the devices with flavored "e-liquid" that does not contain nicotine, was the most common, but some teens noted they didn't always know what was in the device, said Volkow.
"These are the new routes of administration for marijuana, nicotine, or other substances by teens", Compton says. But vaping is on the rise. But clearly marijuana use isn't declining and that's a problem, Volkow added. "And we may lose some of that territory if we don't pay attention to the transition from vaping nicotine into combustible tobacco".
This year's survey showed marijuana use was up overall about 1 percent, with almost a quarter saying they'd vaped, smoked or eaten marijuana in the previous year.
The results released Thursday also show that the use of cocaine, heroin and other illicit drugs continues to decline overall, to the lowest levels seen in the 43 years of the survey.
The University of Michigan's Dr. Richard Miech, a co-investigator of the study, said the uptick in marijuana use this year can be attributed to changes in state laws regarding marijuana use. In this video, Dr. Johnston talks about four decades of research into teen drug use and attitudes. "A lot of youth are interpreting that legalization as a sign that states are sanctioning it; that it's OK".
Teen use of marijuana remains high and vaping appears to be one reason, a new USA survey shows.
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Even though he is only a stand-in, Larrea has made clear he wants to see out Villar's term, which was due to end in 2020. It would lead to the country being kicked out of the 2018 World Cup should they not heed FIFA's severe warnings.
Almost a quarter of students said they had vaped, smoked or eaten marijuana in the previous year.
Marijuana usenationallyamong adolescents edged upward in 2017, the first significant increase in seven years, according to a study released this week.
Miech said NIDA's latest study focuses on more recent responses from a slightly older group of teens.
There's also been a leveling off in binge drinking - having five or more drinks in a row within the past two weeks, the survey showed.
Both studies found dwindling use of cigarettes.